Reasonableness Monitor

2. The FCC of claim 1, wherein the first index value and the second index value are calculated as a function of whether the first and second index values are in-line valid.

3. The FCC of claim 1, wherein the first index value and the second index value are calculated as a function of whether the first and second index values are provided by an air data computer that has provided the most values that are in-line valid.

4. The FCC of claim 1, wherein the first index value and the second index value are calculated as a function of whether an operating mode of the respective air data computers is not degraded.

5. The FCC of claim 1, wherein the first index value and the second index value are calculated as a function of whether a global positioning system threshold check has passed for the respective systems supplying GPS data to the ICC.

6. The FCC of claim 1, wherein the first index value and the second index value are calculated as a function of whether the first value and the second value are closest to a GPS comparison reference value.

7. The FCC of claim 1, wherein (1) whether the first and second index values are in-line valid is assigned a Bit Number of 4 and a Bit Value of 16, (2) whether the first and second index values are provided the associated first air data computer and second air data computer that has provided the most values that are in-line valid is assigned a Bit Number of 3 and a Bit Value of 8, (3) whether an operating mode of the respective air data computers is not degraded is assigned a Bit Number of 2 and a Bit Value of 4, (4) whether a global positioning system threshold check has passed for the respective systems supplying GPS data to the ICC is assigned a Bit Number of 1 and a Bit Value of 2, and (5) whether the first value and the second value are closest to a GPS comparison reference is assigned a Bit Number of 0 and a Bit Value of 1.

8. The FCC of claim 7, wherein the first and second index values are calculated by summing the Bit Values for each true question associated with the respective first and second index values.

10. The method of claim 9, wherein the first index value and the second index value are calculated as a function of whether the first and second index values are in-line valid.

11. The method of claim 9, wherein the first index value and the second index value are calculated as a function of whether the first and second index values are provided by an air data computer that has provided the most values that are in-line valid.

12. The method of claim 9, wherein the first index value and the second index value are calculated as a function of whether an operating mode of the respective air data computers is not degraded.

13. The method of claim 9, wherein the first index value and the second index value are calculated as a function of whether a global positioning system threshold check has passed for the respective systems supplying GPS data to the ICC.

14. The method of claim 9, wherein the first index value and the second index value are calculated as a function of whether the first value and the second value are closest to a GPS comparison reference value.

15. The method of claim 9, wherein (1) whether the first and second index values are in-line valid is assigned a Bit Number of 4 and a Bit Value of 16, (2) whether the first and second index values are provided by whichever of the first air data computer and second air data computer that has provided the most values that are in-line valid is assigned a Bit Number of 3 and a Bit Value of 8, (3) whether the operating mode of the respective air data computers is not degraded is assigned a Bit Number of 2 and a Bit Value of 4, (4) whether a global positioning system threshold check has passed for the respective systems supplying GPS data to the ICC is assigned a Bit Number of 1 and a Bit Value of 2, and (5) whether the first value and the second value are closest to a GPS comparison reference is assigned a Bit Number of 0 and a Bit Value of 1.

16. The method of claim 15, wherein the first and second index values are calculated by summing the Bit Values for each true question associated with the respective first and second index values.